Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee89beb4313c7d5…

MALICIOUS

PDF

86.3 KB Created: 2021-06-26 05:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 53e1aacd3a8ccef47bf7b1a46e09a71f SHA-1: 686aa96f6b037b76f9435836f3470fb8b5eba9f8 SHA-256: 2ee89beb4313c7d5022829a32931678462d82d81ca8fbab6ee1016b52fed98a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing to multiple external PDF files, many hosted on compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbcf406c4b---sufizeliw.pdf
    • https://xanbiente.de/userfiles/file/gomavarizirubotilutev.pdf
    • http://analogsys.com/uploaded/file/507324349609362d75f38b.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/da5f0ca5c1107bb32950dc61fa3c467e/nipaxe.pdf
    • http://maxidmum.com/images/upload/fck/file/11874197329.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/0c4898e76773466ded7968aee8c72c80/89282775695.pdf
    • http://brlairport.com/images/file/69179977183.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/kt0bbm4omdks54m28mpi96n1n6/noxovojizar.pdf
    • http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/18888217594.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/uag1bhn634jkljcgm1k9ov8afj/45176998481.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bf0e478e8e3---vudadowovibimiwo.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712fdebde07---fiwoludexen.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e83591b7d3---82876539553.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8d632557f---bisofusu.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd016b1d5e---38396261920.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e06cb6f94---debisejekijukiwig.pdf
    • https://marosme.ro/hirek/file/dubegesebilomiw.pdf
    • http://mazdooradda.com/userfiles/file/14653555186.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/2b5b52abbe77b5306ad3491d66f266a6/bixudukibeborapogunef.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8828dd2da0---63158241516.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8064c00200---6732180182.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=what+is+electromagnetic+damping
    • http://s292376414.onlinehome.fr/datas/imgmail/file/penumugunosomu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DC 16792 bytes
font_01_sfnt_off0000ffee.bin
c8cd5345743048da8b155158b77716ba7999610df970ff2a7fe7af522937fe66
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEE 19212 bytes
font_02_sfnt_off00013321.bin
2545ac10f0e67f7c8a4ae1e078b2c6425ceb1e7d60f080cb6cec705eaf9e360f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13321 10956 bytes